The next version of Apple's Macintosh operating system will include an auto-save back-up system.

Apple has revealed that the next version of its Macintosh operating system will include an auto-save system. The new feature, called Time Machine, will enable users to auto-save their files and folders, including images, to either an external hard drive or to online servers.

Users will also be able to search for lost files simply by moving a slider back in time within programs such as iPhoto, said CEO Steve Jobs.

Currently only 26% of people currently back-up files and a recent survey revealed that one-third of UK digital camera owners do not back up their images.

The new operating system, known as Leopard, is expecting to be available in Spring next year.